How to encrypt a pdf before sending it by email
- Step 1Finalise the PDF to send — Complete all edits and confirm the document is ready.
- Step 2Encrypt with a strong password — Upload to the password protect tool and set a strong, unique password.
- Step 3Attach the encrypted PDF to your email — Add the password-protected PDF as the attachment.
- Step 4Send the password separately — Communicate the password by phone, SMS, or a separate message channel.
Frequently asked questions
Does this meet GDPR requirements for sending personal data?+
Encrypting the attachment is a recognised technical measure under GDPR Article 32. Consult your DPO for full compliance assessment.
Can I open the encrypted PDF in Gmail or Outlook preview?+
Email preview panes don't support password-protected PDFs. The recipient will need to download and open it in a PDF viewer.
What if the recipient forgets the password?+
Send a password reminder via a secure channel. The only way to access the file without the password is to obtain it from you.
Privacy first
All PDF processing runs locally in your browser using PDF-lib and pdf.js. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.